Efthimios, were you able to verify that the problem existed before you
installed the new package? I've been experiencing this problem for
months, but sporadically. I tried installing the new package and was
fine most of the time, but did see a dock on the lock screen once
(though it could be that I forgot to restart after installing).

--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-shell-extension-ubuntu-dock in
Ubuntu.
https://bugs.launchpad.net/bugs/1769383
Title:
Ubuntu dock/launcher is shown on the lock screen
Status in gnome-shell package in Ubuntu:
Invalid
Status in gnome-shell-extension-ubuntu-dock package in Ubuntu:
Fix Released
Status in gnome-shell source package in Bionic:
Invalid
Status in gnome-shell-extension-ubuntu-dock source package in Bionic:
In Progress
Status in gnome-shell source package in Cosmic:
Invalid
Status in gnome-shell-extension-ubuntu-dock source package in Cosmic:
Fix Committed
Status in gnome-shell source package in Disco:
Invalid
Status in gnome-shell-extension-ubuntu-dock source package in Disco:
Fix Released
Bug description:
[Impact]
When entering the lock-screen mode, gnome-shell disables all the extensions.
It can happen that under certain conditions ubuntu-dock re-enables itself,
causing the ubuntu-dock to appear in the lock-screen, exposing sensitive
information. One possible way to reproduce this is to enable dash-to-dock and
ubuntu-dock at the same time.
[Test Case]
1. Make sure ubuntu-dock is enabled
2. Enable dash-to-dock too
3. Lock the screen
4. Make sure the dock does not appear on the lock screen
5. Make sure there is no warning is the journal
[Possible Regressions]
Even if it's something we don't really support please make sure that you can
use dash-to-dock without uninstalling ubuntu-dock.
[Original Bug]
After an update from ubuntu 16.04 to 18.04 the dock is aviable on the
lockscreen after user login.
I did not configure this knowingly. Also i can start every application which
is available on the dock.
Settings, virtual box, visualstudio code and so on.
After the update to 18.04 i just configure the screen frequency to
144Hz and the night mode on. And attach the dock on bottom.
I later undid these customizations back to configuration before, but
the dock is stil aviable on lockscreen.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-settings-daemon 3.28.1-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat May 5 18:30:16 2018
InstallationDate: Installed on 2018-04-08 (27 days ago)
InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64
(20180228)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=de_DE.UTF-8
SHELL=/bin/bash
SourcePackage: gnome-settings-daemon
UpgradeStatus: Upgraded to bionic on 2018-05-01 (3 days ago)
---
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 18.04
InstallationDate: Installed on 2018-04-08 (27 days ago)
InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64
(20180228)
NonfreeKernelModules: nvidia_modeset nvidia
Package: gnome-shell-extension-ubuntu-dock 0.9.1
PackageArchitecture: all
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=de_DE.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Tags: bionic
Uname: Linux 4.15.0-20-generic x86_64
UpgradeStatus: Upgraded to bionic on 2018-05-01 (4 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1769383/+subscriptions
--
Mailing list: https://launchpad.net/~desktop-packages
Post to : desktop-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~desktop-packages
More help : https://help.launchpad.net/ListHelp